Question about 2003 Dodge Grand Caravan AWD

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High gas mileage (15- 20 l per 100km)

Got a 2003 grand caravan 3.3 80000 km and last few months the mileage has increased dramatically. checked and changed air filter will try plugs next, any ideas?

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  • Anonymous Feb 03, 2009

    The fuel drops as your mileage get better.My mpg is lower. About 8-10 mpg at times. I change oil religiously every 7000km. Gas is always bought at reputable stations. I haven't seen any stains on the floor so I don't think its a leak unless it happens under pressure when the motor is running. It has me stumped. Maybe EGR valve starting to go?
    Thanks to all who answered Sorry for the misunderstanding. Using litres per 100 kilometers is opposite to mpg.

  • eviotis Feb 03, 2009

    comment by "guest" was mine sorry this site is new to me.

  • Mike Butler
    Mike Butler May 11, 2010

    You sure you don't mean DECREASED?

  • Tha Jeeper May 11, 2010

    Are you getter BETTER or WORSE gas mileage? Or is your odometer reading more miles than you drive? Better gas mileage is good, if you actually are, but bad gas mileage is not and air filter and plugs and wires are good starts. Could be a misfire or not firing - plugs, wires, lost compression, bad seal. Could just be bad gas - some gas goes through quicker and some don't. You could also try using a fuel injector cleaner and oil change along with oil additive like Lucas.

  • ccn7 May 11, 2010

    i don't know what your complaning about i would be overjoyed if my car all of a sudden had an increase in gas millage,

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Try changing the oil also it will cause the engine to burn more fuel with bad oil because it gets hot and evaporates it alot more

Posted on Feb 03, 2009

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In your vehicle, you should be getting an average of 18-20 MPG. There are several factors that can affect your fuel consumption: Low tire pressure, the wrong oil weight (you should be using 5W-20 or 5W-30), excessively rich fuel mixture, incorrect ignition timing, defective catalytic converter, defective oxygen sensor (which can cause the too rich fuel mixture and also affect the timing). Based on what you are describing, I'm betting on the oxygen sensor, because it is one of the malfunctions that can cause such a dramatic (and sudden) change to fuel consumption.

Posted on Sep 19, 2013

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